He who lives without folly isn't so wise as he thinks.
There are heroes of wickedness, as there are of goodness.
We own up to minor failings, but only so as to convince others that we have no major ones.
There are a great many men valued in society who have nothing to recommend them but serviceable vices.
It's the height of folly to want to be the only wise one.
It is often laziness and timidity that keep us within our duty while virtue gets all the credit.